Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ec9d91af99d161bdc57a2654107329dda8eef3dd6df0f8a5bec2c80b7e383717' 
  AND token = 'b1NBXqDiHGO88tCg+/lv4PWi+Rvldn/yXy2m3HNp9GI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00079

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}